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| Maguari is related to Cache Valley and Tensaw. The following data are from Whitman at the Rockefeller Foundation Virus Laboratories, New York: |
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| Cross-HI tests between Maguari, Tensaw and Cache Valley Sera |
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| | Antigens |
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| Sera | Maguari BeAr 7272 | Cache Valley(6V663) | Tensaw A9-171b |
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| | ** Tr20659 (ex Trinidad) and BeAr 7272 have previously been shown to be indistinguishable. | | Maguari Mouse (Tr20659 ** | 160 | 40 | 40 | | Cache Valley (6V633) Rabbit | 40 | 160 | 40 | | Tensaw (A9-171b) | 40 | 40 | 160 |
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| Cross-neutralization tests in baby mice. Dex virus neutralized |
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| | Viruses |
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| Sera | Maguari (BeAr 7272) | CV (6V633) |
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| | Maguari Mouse | 3.5 | 2.2 | | Cache Valley Mouse | 2.3 | 4.6 | | Cache Valley Rabbit | 2.3 | 3.4 |
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| SIRACA has antigenically classified Maguari virus as a subtype of Cache Valley virus. Playas virus and an unregistered virus were also classified as subtypes of Cache Valley virus. The unregistered isolate from Argentina was considered to be a variety of Maguari virus [18] . |
| For additional information on antigenic relationships, see Reference [19] . |
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